Bulla
Gastropod
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Bulla is a genus of medium to large hermaphrodite sea snails, shelled marine opisthobranch gastropod molluscs. These herbivorous snails are in the suborder Cephalaspidea, headshield slugs, and the order Opisthobranchia. Wikipedia
Scientific name: Bulla
Class: Gastropoda
Family: Bullidae; (Rafinesque, 1815)
Phylum: Mollusca
Genus: Bulla; Linnaeus, 1758
Order: Cephalaspidea